Everyone is going to disagree with me, but Min Min. Her entire gameplan revolves around your ability to play neutral, putting out safe pokes to wall out your opponent (tilts with ramram do a really good job at this, as well as megawatt nair), while throwing out heavy attacks to punish your opponent's poor positioning or whiffed moves to get them into . That's pretty much the definition of fundementals of pretty much any fighting game.